No rate limit for canMakePayment() on localhost and file://.

components/payments/content/origin_security_checker.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PAYMENTS_CONTENT_ORIGIN_SECURITY_CHECKER_H_
 #define COMPONENTS_PAYMENTS_CONTENT_ORIGIN_SECURITY_CHECKER_H_
 
 #include "base/macros.h"
 
 class GURL;
 
 namespace payments {
 
 class OriginSecurityChecker {
  public:
   // Returns true for a valid |url| from a secure origin.
   static bool IsOriginSecure(const GURL& url);
 
   // Returns true for a valid |url| with a cryptographic scheme, e.g., HTTPS,
   // HTTPS-SO, WSS.
   static bool IsSchemeCryptographic(const GURL& url);
 
+  // Returns true for a valid |url| with localhost or file:// scheme origin.
+  static bool IsOriginLocalhostOrFile(const GURL& url);
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(OriginSecurityChecker);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_ORIGIN_SECURITY_CHECKER_H_